I just put a 90 ls in my 89 crx (hf) My friend had a ecu with with a jun pm6 chip already installed. I bought it from him and now i was told that is was for a single cam. I talked with a guy that chips ecu's and he told me to send him the ecu and he would put a pr4 jun chip in it. Will it be better to chip a stock ls ecu or will this won turn out just like a ls ecu. my car runs ok but has a miss but i dont know if it is from the ecu or the motor b/c the motor was sitting for year and a half and i have a single cam distrubitor on it. thanks for the help.

Okay make sure it isn't those ebay chip, sometimes the mapping is wrong. Try using a ls dizzy and see if it fix your problem.

I wouldnt trust a Jun Chip for anything cuz all they do is fuck up your fuel and ignition maps...

Just find a STOCK PR4 ecu and run that.